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質問 # 336
Which of the following best describes the challenges associated with widespread adoption of homomorphic encryption techniques?
正解：C
質問 # 337
A vulnerability can on a web server identified the following:
Which of the following actions would most likely eliminate on path decryption attacks? (Select two).
正解：A、D
解説：
On-path decryption attacks, such as BEAST (Browser Exploit Against SSL/TLS) and other related vulnerabilities, often exploit weaknesses in the implementation of CBC (Cipher Block Chaining) mode. To mitigate these attacks, the following actions are recommended:
B . Removing support for CBC-based key exchange and signing algorithms: CBC mode is vulnerable to certain attacks like BEAST. By removing support for CBC-based ciphers, you can eliminate one of the primary vectors for these attacks. Instead, use modern cipher modes like GCM (Galois/Counter Mode) which offer better security properties.
C . Adding TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA256: This cipher suite uses Elliptic Curve Diffie-Hellman Ephemeral (ECDHE) for key exchange, which provides perfect forward secrecy. It also uses AES in GCM mode, which is not susceptible to the same attacks as CBC. SHA-256 is a strong hash function that ensures data integrity.
Reference:
CompTIA Security+ Study Guide
NIST SP 800-52 Rev. 2, "Guidelines for the Selection, Configuration, and Use of Transport Layer Security (TLS) Implementations" OWASP (Open Web Application Security Project) guidelines on cryptography and secure communication
質問 # 338
A security architect wants to prevent security impacts from input into data fields, such as the following:
'AND 1=1#
Which of the following would best accomplish this objective?
正解：D
解説：
The root of SQL injection (e.g., ' AND 1=1#) is unsafe string concatenation in application code. A robust secure-coding standard mandates parameterized queries (or stored procedures), strict input validation/whitelisting, and escaping of any user-supplied data. By embedding these practices into your development guidelines and enforcing them through code reviews and automated scans, you eliminate SQL injection and similar input-based attacks at the source.
質問 # 339
An organization wants to create a threat model to identity vulnerabilities in its infrastructure. Which of the following, should be prioritized first?
正解：A
解説：
When creating a threat model to identify vulnerabilities in an organization's infrastructure, prioritizing external-facing infrastructure with known exploited vulnerabilities is critical. Here's why:
Exposure to Attack: External-facing infrastructure is directly exposed to the internet, making it a primary target for attackers. Any vulnerabilities in this layer pose an immediate risk to the organization's security.
Known Exploited Vulnerabilities: Vulnerabilities that are already known and exploited in the wild are of higher concern because they are actively being used by attackers. Addressing these vulnerabilities reduces the risk of exploitation significantly.
Risk Mitigation: By prioritizing external-facing infrastructure with known exploited vulnerabilities, the organization can mitigate the most immediate and impactful threats, thereby improving overall security posture.
質問 # 340
A Chief Information Security Officer is concerned about the operational impact of ransomware. In the event of a ransomware attack, the business requires the integrity of the data to remain intact and an RPO of less than one hour. Which of the following storage strategies best satisfies the business requirements?
正解：C
解説：
Comprehensive and Detailed In-Depth Explanation:
* Remote journaling continuously sends log updates to a remote system, ensuring near-real-time backup and an RPO (Recovery Point Objective) under one hour.
* Key concepts:
* RPO under one hour means minimal data loss.
* Remote journaling provides rapid recovery by keeping near-live backups.
* Other options:
* A (Full disk encryption) protects against unauthorized access but does not aid recovery.
* C (Immutable storage) prevents modification but does not ensure real-time backups.
* D (RAID 10) improves redundancy but does not help against ransomware.
質問 # 341
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